/* ==========================================================================
   Likoma Airlines — Navigation
   --------------------------------------------------------------------------
   Sticky header that starts transparent over the hero, then condenses into a
   solid, slightly shorter bar once the page scrolls. Below the `lg`
   breakpoint the primary nav collapses into a full-height side drawer.

   State is driven by two data attributes set in header.js:
     data-scrolled="true"   past the scroll threshold
     data-hidden="true"     scrolling down, out of the way
   ========================================================================== */

/* --- Utility bar --------------------------------------------------------- */

.lk-topbar {
  position: relative;
  z-index: calc(var(--z-header) + 1);
  block-size: var(--topbar-height);
  border-block-end: 1px solid rgb(255 255 255 / 0.1);
  background-color: transparent;
  color: rgb(255 255 255 / 0.78);
  font-size: var(--text-sm);
  transition: background-color var(--duration-base) var(--ease-soft),
              color var(--duration-base) var(--ease-soft),
              border-color var(--duration-base) var(--ease-soft);
}

.lk-topbar__inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-5);
  block-size: 100%;
}

.lk-topbar__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: inherit;
  transition: color var(--duration-fast) var(--ease-soft);
}

.lk-topbar__link:hover { color: currentColor; opacity: 1; filter: brightness(1.4); }

/* --- Header shell -------------------------------------------------------- */

.lk-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-header);
  background-color: transparent;
  color: #fff;
  transition:
    background-color var(--duration-base) var(--ease-soft),
    box-shadow var(--duration-base) var(--ease-out),
    color var(--duration-base) var(--ease-soft),
    transform var(--duration-slow) var(--ease-out);
}

/* Condensed: solid surface, shorter bar, real shadow */
.lk-header[data-scrolled="true"] {
  background-color: var(--glass-bg);
  color: var(--color-text-primary);
  box-shadow: 0 1px 0 var(--color-border-subtle), var(--shadow-md);
}

/* Slides away on downward scroll, returns instantly on upward */
.lk-header[data-hidden="true"] {
  transform: translateY(-100%);
}

/* Pages without a dark hero (interior pages) start solid */
.lk-header--solid {
  position: sticky;
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  box-shadow: 0 1px 0 var(--color-border-subtle);
}

/* The bar runs to the wider container than page content does: eight top-level
   items plus the action cluster do not fit inside the 1280px text measure,
   and a header spanning wider than the body reads as deliberate. */
.lk-header .lk-container,
.lk-topbar .lk-container {
  --container-width: var(--container-2xl);
}

.lk-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  block-size: var(--header-height);
  transition: block-size var(--duration-base) var(--ease-out);
}

.lk-header[data-scrolled="true"] .lk-header__inner {
  block-size: var(--header-height-compact);
}

/* The logo shrinks with the bar rather than jumping */
.lk-header[data-scrolled="true"] .lk-logo {
  --logo-height: 34px;
}

/* Swap the white lockup for the full-colour one when the bar goes solid */
.lk-logo__on-dark,
.lk-logo__on-light { display: block; }
.lk-logo__on-light { display: none; }

.lk-header[data-scrolled="true"] .lk-logo__on-dark,
.lk-header--solid .lk-logo__on-dark { display: none; }

.lk-header[data-scrolled="true"] .lk-logo__on-light,
.lk-header--solid .lk-logo__on-light { display: block; }

/* --- Primary navigation --------------------------------------------------- */

.lk-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-inline-start: var(--space-2);
  /* Lets the nav be the thing that gives when the bar is tight, rather than
     pushing the CTA off the end of the container. */
  min-inline-size: 0;
}

.lk-nav__item {
  position: relative;
}

.lk-nav__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1-5);
  padding: var(--space-2-5) var(--space-3);
  border-radius: var(--radius-full);
  color: inherit;
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  white-space: nowrap;
  cursor: pointer;
  transition: var(--transition-colors);
}

.lk-nav__link:hover {
  background-color: var(--color-hover-tint);
}

.lk-header:not([data-scrolled="true"]):not(.lk-header--solid) .lk-nav__link:hover {
  background-color: rgb(255 255 255 / 0.14);
}

.lk-nav__link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.lk-nav__link[aria-current="page"] {
  font-weight: var(--weight-semibold);
}

/* Active indicator sits under the pill, not on the text */
.lk-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  inset-block-end: -2px;
  inset-inline-start: 50%;
  translate: -50% 0;
  inline-size: 18px;
  block-size: 2px;
  border-radius: var(--radius-full);
  background-color: currentColor;
}

.lk-nav__chevron {
  inline-size: 14px;
  block-size: 14px;
  opacity: 0.7;
  transition: transform var(--duration-fast) var(--ease-out);
}

.lk-nav__item[data-open="true"] .lk-nav__chevron {
  transform: rotate(180deg);
}

/* --- Mega menu -----------------------------------------------------------
   Anchored to the header, not to the trigger, so wide panels stay centred
   and never overflow the viewport.
   ------------------------------------------------------------------------ */

.lk-mega {
  position: absolute;
  inset-block-start: calc(100% + var(--space-3));
  inset-inline-start: 50%;
  translate: -50% 0;
  z-index: var(--z-dropdown);
  inline-size: max-content;
  max-inline-size: min(56rem, calc(100vw - var(--space-12)));
  padding: var(--space-6);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-panel);
  background-color: var(--color-surface);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-2xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition:
    opacity var(--duration-fast) var(--ease-soft),
    transform var(--duration-base) var(--ease-out),
    visibility var(--duration-base);
}

.lk-nav__item[data-open="true"] .lk-mega {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lk-mega__grid {
  display: grid;
  grid-template-columns: repeat(var(--mega-cols, 3), minmax(0, 1fr));
  gap: var(--space-6);
}

.lk-mega__col {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-inline-size: 12rem;
}

.lk-mega__heading {
  padding-inline: var(--space-3);
  margin-block-end: var(--space-2);
  font-size: var(--text-2xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.lk-mega__link {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast) var(--ease-soft);
}

.lk-mega__link:hover {
  background-color: var(--color-primary-soft);
}

.lk-mega__link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Gated by App\Filters\LaunchGate — dimmed rather than truly disabled, since
   the link still goes to the coming-soon notice rather than nowhere. */
.lk-mega__link[aria-disabled="true"] { opacity: 0.55; }

/* Same "Soon" treatment as .lk-navrail__soon (shell.css), but that one is
   tuned for the dark rail — the flyout is a light card, so this gets its
   own rule rather than fighting the other file's background over the cascade. */
.lk-mega__soon {
  flex-shrink: 0;
  margin-inline-start: var(--space-2);
  padding: 1px var(--space-1);
  border-radius: var(--radius-sm);
  background: var(--color-warning-bg);
  color: var(--color-warning-fg);
  font-size: var(--text-2xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.lk-mega__icon {
  display: grid;
  place-items: center;
  inline-size: 34px;
  block-size: 34px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
}

.lk-mega__icon svg { inline-size: 18px; block-size: 18px; }

.lk-mega__title {
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.lk-mega__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
  color: var(--color-text-muted);
}

/* Promotional rail inside the mega menu */
.lk-mega__feature {
  padding: var(--space-5);
  border-radius: var(--radius-xl);
  background: var(--gradient-mist);
  border: 1px solid var(--color-border-subtle);
}

/* --- Header actions ------------------------------------------------------- */

.lk-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-inline-start: auto;
}

.lk-header__actions .lk-icon-btn {
  color: inherit;
}

.lk-header:not([data-scrolled="true"]):not(.lk-header--solid) .lk-icon-btn:hover {
  background-color: rgb(255 255 255 / 0.14);
}

/* Language / currency selector */
.lk-locale {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  color: inherit;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-soft);
}

.lk-locale:hover { background-color: var(--color-hover-tint); }

.lk-locale__divider {
  inline-size: 1px;
  block-size: 12px;
  background-color: currentColor;
  opacity: 0.3;
}

/* --- Mobile trigger -------------------------------------------------------
   Two bars that cross into an X. Cheaper and smoother than swapping icons.
   ------------------------------------------------------------------------ */

.lk-burger {
  display: none;
  position: relative;
  inline-size: 44px;
  block-size: 44px;
  border-radius: var(--radius-full);
  color: inherit;
  cursor: pointer;
}

.lk-burger__bars,
.lk-burger__bars::before,
.lk-burger__bars::after {
  position: absolute;
  inline-size: 20px;
  block-size: 2px;
  border-radius: var(--radius-full);
  background-color: currentColor;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-fast) var(--ease-soft);
}

.lk-burger__bars {
  inset-block-start: 50%;
  inset-inline-start: 50%;
  translate: -50% -50%;
}

.lk-burger__bars::before { content: ""; inset-block-start: -6px; inset-inline-start: 0; }
.lk-burger__bars::after  { content: ""; inset-block-start: 6px;  inset-inline-start: 0; }

.lk-burger[aria-expanded="true"] .lk-burger__bars { background-color: transparent; }
.lk-burger[aria-expanded="true"] .lk-burger__bars::before { transform: translateY(6px) rotate(45deg); }
.lk-burger[aria-expanded="true"] .lk-burger__bars::after  { transform: translateY(-6px) rotate(-45deg); }

/* --- Mobile drawer navigation --------------------------------------------- */

.lk-mobile-nav {
  display: flex;
  flex-direction: column;
}

.lk-mobile-nav__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-1);
  border-block-end: 1px solid var(--color-divider);
  font-size: var(--text-lg);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  min-block-size: var(--tap-target);
}

.lk-mobile-nav__link:active {
  background-color: var(--color-hover-tint);
}

.lk-mobile-nav__link svg {
  inline-size: 18px;
  block-size: 18px;
  color: var(--color-text-muted);
  transition: transform var(--duration-base) var(--ease-out);
}

.lk-mobile-nav__link[aria-expanded="true"] svg { transform: rotate(180deg); }

.lk-mobile-nav__sub {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-base) var(--ease-out);
}

.lk-mobile-nav__sub[data-open="true"] { grid-template-rows: 1fr; }
.lk-mobile-nav__sub > div { overflow: hidden; }

.lk-mobile-nav__sublink {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-md);
  color: var(--color-text-secondary);
}

/* --- Sticky mobile booking bar --------------------------------------------
   Persistent call to action on small screens once the hero widget scrolls
   out of view.
   ------------------------------------------------------------------------ */

.lk-mobile-cta {
  display: none;
  position: fixed;
  inset-block-end: 0;
  inset-inline: 0;
  z-index: var(--z-sticky);
  padding: var(--space-3) var(--space-4);
  padding-block-end: max(var(--space-3), env(safe-area-inset-bottom));
  background-color: var(--glass-bg);
  border-block-start: 1px solid var(--color-border-subtle);
  transform: translateY(110%);
  transition: transform var(--duration-slow) var(--ease-out);
}

.lk-mobile-cta[data-visible="true"] {
  transform: translateY(0);
}

/* --- Scroll progress ------------------------------------------------------ */

.lk-scroll-progress {
  position: absolute;
  inset-block-end: 0;
  inset-inline-start: 0;
  block-size: 2px;
  inline-size: var(--progress, 0%);
  background: var(--gradient-brand);
  transition: inline-size 60ms linear;
}

/* --- Skip link ------------------------------------------------------------ */

.lk-skip {
  position: absolute;
  inset-block-start: -100px;
  inset-inline-start: var(--space-4);
  z-index: var(--z-max);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  background-color: var(--color-secondary);
  color: var(--color-on-secondary);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  box-shadow: var(--shadow-lg);
  transition: inset-block-start var(--duration-base) var(--ease-out);
}

.lk-skip:focus {
  inset-block-start: var(--space-4);
}